SU1056479A1 - Magnetodynamic dispensing plant - Google Patents

Abstract

MAGNETODYNAMIC DISTRIBUTION INSTALLATION, containing melting. a vessel with a metal pipe provided with a control branch channel, with which a metal level sensor in the channel is connected, gas supply and pressure relief valves, inductors and a melt discharging electromagnet, supplied with control signals with Fill and Storage inputs, which are reliability of the installation and accuracy of metal dosing; the control channel is sealed with a gas pressure sensor in the channel and connected to the valves through a sealed metal-tight plug, controls the input of the relief valve and gas effects through the first disconnecting key connected to the inlet. Storage of the inductor control unit connected to the inlet. Storage of the etching unit by an electromagnet through the second disconnecting key. The control input of the gas supply valve is connected to the output of the element I, the first input of which is connected to the control input of the first key, output level sensor and control input of the control unit zlek, solenoid. the second input - with inputs w. Filling of both control units, and the third - with the output of the comparison unit connected to the first input with the pressure setting device, and the second input to the output of the pressure sensor and through the null organ with the control key of the Second key. SP and si co

Description

The invention relates to foundry and can be applied in the production of non-ferrous and ferrous alloys.

Known dispensing units with 1-channel duct heating are known, in which furnace inclination, overpressure of the metal mirror and the influence of electromagnetic forces are used to fill and meter the metal.

Among the dispensers with the metal under the action of electromagnetic forces, the most widely used furnace magnetodynamic type.

The melting capacity of such a furnace in the lower part is equipped with an W-shaped channel, two external channels are covered by inductors, which are a magnetic circuit with windings. At the point of connection of the middle channel there is an electromagnet, which is a C-shaped magnetic circuit with a winding. When turning on the windings of the inductors in the channel current is indicated and when the electromagnet winding is turned on, electromagnetic forces arise that displace the metal from the middle channel to the metalworker for casting. During the pouring process, the metal rises to the floor. the height of the metal pipe, and then dumped back into the melting tank. At the same time, nastily remain in the metal conductor, reducing its passage: the cross section, as a result of which dosing errors occur,

Closest to the invention, the technical essence is & a magnetodynamic dispensing system comprising a smelting vessel with a metal smelter, equipped with a test tap 1m channel with which the level sensor is connected; metal in the channel, gas supply and pressure relief valves, inductors and a melt discharge electromagnet, equipped with control units with inlet Fill and Storage inputs. This installation is equipped with a metal level sensor on a metalworking medium and a height adjustable metal pressure sensor 2 J,

Between the fillings, the metal level is maintained at the cut-off section. When the fill is turned on, the pressure of the metal is monitored by a pressure sensor. To create the necessary flow through the drain socket of the metal pipe, a large pressure is required, which entails a great height at which the pressure sensor should be installed, which in turn increases the dimensions of the control branch channel in which the sensors are installed. In addition, the metal level sensor at the metalworking section is washed with metal during the pouring, which leads to an increase of the crust on it and, as a result,

level measurement error at the metallode slice.

The aim of the invention is to improve the reliability of the dispenser and

increase in metal dosing accuracy.

To achieve this goal, in a magnetodynamic dispensing installation containing a melting tank with a metal furnace equipped with a control channel with which the metal level sensor in the channel is connected,. - gas supply and discharge valves, inductors and electromagnet of the melt, equipped with control units with inlet Fillings and X1), control channel is sealed, equipped with a gas pressure sensor in the channel and connected to the valves through a sealed metal-resistant plug, control valve input gas pressure relief through the first disconnecting key connected

0 with an input Storage of the inductor control unit, connected with the input Storage of the electromagnet control unit through a second disconnecting key, controlling the input of the gas supply valve connected to the output of the I element, the first input of which is connected to the control input of the first key, the output of the level sensor and controlling the input of the electromagnet control unit, the second input - with the inputs Filling both control units,

Q and the third - with the output of the comparison unit, the first input with the head setter, and the second input with the output of the pressure sensor and through a null organ with the control input of the second key,

The drawing shows the block diagram of the installation,.

Magnetodynamic distribution installation contains a melting tank 1, inductors 2, an electromagnet 3, an inductor control unit 4 with inputs Storage and Filling, an electromagnet control unit 5 with inputs Storage, Filling and control input for power control, heating the metal pipe 6 with a control branch channel 7, having an air inlet closed by a metal-tight stopper, a sensor 8, for example, a capacitive level: metal. The installation also has valves 9 and 10 for supply and discharge of gas (compressed air), pressure sensor I, setpoint adjuster 12, unit

 Comparison 13, null-organ 14, element 15, disconnecting keys 16 and 17, conclusions Storage 18 and Fill 19,

The installation works as follows

5 in the Storage mode, the signal of logical 1 from pin 18 is fed to the input. Storage of block 4, Pressure in the control bypass channel is absent. A low level signal from pressure sensor 11 causes a logical O signal at the output of the null organ 14, which steps into the control input of the open key 17. The storage signal is fed through the specified key to the corresponding input of the control unit 5 of the electronic converter, putting it into the Storage mode. The signal O from pin 19 Fill locks the element And 15, and through it the valve 9 of the compressed air supply. If the metal level decreases, then a signal O appears at the output of the metal level sensor 8, which is fed to the control input of the electrically controlled unit 5 by a magnetic magnet, which leads to an increase in the power supplied to the electromagnet 3 and an increase in metal pressure. The metal level goes. If the metal level is higher than the cutoff of the metal detector, the metal level sensor 8 emits a signal 1 to the electromagnet control unit 5. At this, power is reduced, supplied to electromagnet 3. Power reduction continues until the signal O appears at the output of pressure sensor 8. When the unit switches to the bleeding mode, signal 1 from pin 19 goes to the corresponding input 1 of block 4 and block 5 Electromagnet 5 in the appropriate mode, as well as element I 15, allowing its operation. At the output of the pressure sensor 11, there is no signal, therefore, at the output of the comparator unit 13, there is a signal 1 arriving at the input of the element 15. When the metal is at the metal cut, a level sensor 8 triggers and causes the signal 1 to the input of the element 15, which leads to opening valve 9 compressed air supply. Since the volume of the control outlet channel 7 is small, the pressure in it quickly increases. When the metal in the control outlet channel 7 is displaced below the level of the sensor 8, the O signal from the output of the latter locks the element I 15. The valve 9 is closed, stopping the supply of air to the control outlet channel. At the same time, the magnet control unit 5 increases the power supplied to the electromagnet. The metal level, rising, reaches the level 8 sensor, the valve 9 opens and re-supplies compressed air to the control discharge channel 7. When the signal at the output of pressure sensor 11 reaches the value specified by the setting device 12, the signal O at the output of the comparison unit 13 blocks the AND element 15, which causes the valve 9 to close. The metal level in the control outlet channel 7 is maintained at the level of the sensor 8. But, since the pressure of the metal in this case balances the excess air pressure, in the control outlet valve 7, the pressure of the melt bespechivaet required flow through the drain sock. When the installation goes to the Storage mode, the signal 1 supplied to the OUTLET 18 transfers the block 4 to the Storage mode and through the disconnecting key 16 enters the control input of the valve 10 of the compressed air release. While there is an excess air pressure in the control outlet channel 7, the pressure sensor 11 through the null organ 14. and the opening key 17 turns off the electromagnet control unit 5. If the level of the metal in the control outlet channel 7 rises, the level 8 sensor issues a signal 1 and softens the key 16. The air pressure relief valve 10 is turned off. When the melt level decreases, valve 10 is turned on again. This prevents the air inlet to the control outlet channel 7 from being overlaid with metal. When exhausting air pressure is relieved in the control outlet channel 7, the O signal appears at the exit of the null organ 14. The key 17 closes and switches the control unit 5 {stromagnet) into the XrayE mode. The advantage of the proposed device in comparison with the lime is as follows: .-. reliability of operation and accuracy of metal dosing, reduction of time and metal casting.

Claims (1)

_h MAGNETIC TRANSMISSION UNIT containing melting. schcho. a tank with a metal guide equipped with a control outlet channel, to which a metal level sensor in the channel, gas supply and pressure relief valves, inductors and a melt dispensing electromagnet equipped with control units with inputs "Fill" and "Storage", characterized in, < that, with a tulle to increase the reliability of the installation and the accuracy of metal dosing, the control channel is sealed, equipped with a gas pressure sensor in the channel and connected to the valves through a sealed metal-tight plug, the control valve inlet of the valve gas pressure through the first disconnecting key is connected to the input “Storage” of the control unit of the inductors connected to the input “Storage” of the control unit of the electromagnet through the second disconnecting key, the control input of the gas supply valve is connected to the output of the element And, the first input of which is connected to the control the input of the first key, the output of the level sensor and the control input of the electromagnet control unit. the second input is with the “Fill” inputs of both control units, and the third is with the output of the comparison unit, connected by the first input to the pressure head, and the second input is with the output of the pressure sensor and through the zero-organ with the control input of the second key.